Data for Slovenia

Objectives summarised by: Resolution on Transport Policy of the Republic of Slovenia (RePPRS), OG RS, no. 58/2006 and Operational Programme of Environmental and Transport Infrastructure Development for the Period 2007–2013.
Source database or source: Statistical Yearbooks of the Republic of Slovenia 1996–2008
Data administrator: Statistical Office of the Republic of Slovenia (SORS)
Date of acquisition for this indicator: 23 June 2009
Methodology and frequency of data collection for the indicator: The data on road freight transport (public and private) is collected by the SORS and published in the regular annual serial publication “Statistical Yearbook of the Republic of Slovenia”. Since 2001, the data has been based on the regular reports of business entities (legal and natural persons), who own, hire or manage registered cargo motor vehicles with at least two tonnes of load capacity. The selection of rapporteurs is based on a quarterly sample, the basis of which is the Register of Motor Vehicles administered by the Ministry of the Interior. The data of the Ministry of the Interior is compared with the data of the Business Register of Slovenia. Older data (the period 1992-2000) is assessed on the basis of previous research studies of this transport mode, pilot projects conducted in 1999 and 2000, ongoing research studies of road freight transport, data on the border crossings of cargo vehicles, results of traffic counting and the data on business entities dealing with road freight transport.
Road freight transport includes all transport performed by Slovenian vehicles in Slovenia and abroad. However, the data does not indicate the share of routes performed in the domestic network by domestic transport operators with a freight destination or origin abroad. The data on road transport of foreign vehicles in the territory of the Republic of Slovenia is also not available.
Data on rail freight transport is provided to the SORS by Slovenske železnice (Slovenian Railways). The data includes all transport in the territory of the Republic of Slovenia. The data on total port transport in Slovenia refers to the ports of Koper, Izola and Piran; the data on the total freight transport at Slovenian airports refers to the Ljubljana, Maribor and Portorož airports (considering all business entities dealing with the indicated activities). The data on air transport and sea shipping includes all transport (also abroad) performed by the Slovenian transport operators Adria Airways and Splošna plovba.
Data processing methodology: The modal shares of freight transport are expressed by the indicator of freight transport demand – tkm. A tonne kilometre (tkm) is a measuring unit of freight transport, representing the movement of one tonne per one kilometre. In rail freight transport we distinguish between a gross tonne and net tonne kilometre. A gross tonne kilometre is the sum of multiplications of the entire freight weight (freight and wagon weight without the propelling vehicle) and distances, on which this weight did not change during transport. Net tonne kilometre is the sum of multiplications of the weight of transported freight and actual distances, on which the freight was transported (SORS, 2004). The volume of freight transport is expressed by the sum of all performed tonne kilometres in the considered area and in the determined time period; the structure is expressed by the share of tkm (modal split) by individual transport modes (road, rail, maritime, air).
Information concerning data quality:
- Advantages and disadvantages (at data level): The available data does not enable a review of the modal shares of tkm, performed by individual years in the territory of the Republic of Slovenia – the data on rail transport is based on the transport in the territory of the Republic of Slovenia; the data for road transport is based on all (domestic and foreign) transport of domestic transport operators. Transport performed by foreign transport operators in the territory of the Republic of Slovenia is not included. The data on tkm for air and maritime transport also does not enable a limitation to the territory of the Republic of Slovenia; therefore, the data on the freight volume at airports and ports is indicated. Furthermore, the older data (1992-2000) on road freight transport is only estimated and not measured.
- Relevance, accuracy, robustness, uncertainty: Due to several disadvantageses, the data is fairly inaccurate and unreliable, and more indicative in nature.
Reliability of the indicator (archive data): The data refers to a longer time period.
Uncertainty of the indicator (scenarios/projections): Projections have not been prepared.
- Overall assessment (1 = no major comments, 3 = data to be considered with reservation): 2 Projections have not been prepared.
Relevance: 2 (Vehicle-kilometre would be a better unit of measurement, since it is more directly linked to the environmental impact of transport movements) Projections have not been prepared.
Accuracy: 3 (the non-consideration of tkm of foreign transport operators on Slovenian roads and consideration of tkm that Slovenian transport operators perform abroad; the data on road freight transport for the period 1992-2000 is only estimated) Projections have not been prepared.
Completeness over time: 2 (the data on road freight transport until 2000 is estimated, later data was measured) Projections have not been prepared.
Completeness over space: 1

Data for other countries:

Source database or source: TERM 2006 13b – Modal split in freight transport, Indicator Fact Sheet
Data administrator: European Environment Agency (EEA)
Date of acquisition for this indicator: 23 June 2009
Methodology and frequency of data collection for the indicator: The EEA has been obtaining the data on the modal split in freight transport from the common questionnaire, prepared by Eurostat, the European Conference of Transport Ministers (ECMT) and the United Nations Economic Commission for Europe (UNECE).
Data processing methodology: The missing values were obtained by a method of linear extrapolation and by considering the situation in neighbouring countries with a similar level of development in freight transport.
Geographical coverage: The EEA-30 includes the group of 30 EEA Member States for which sufficient data was available. That group is composed of the EU-15 Member States (Belgium, Denmark, Germany, Greece, Spain, France, Ireland, Italy, Luxembourg, the Netherlands, Austria, Portugal, Finland, Sweden and the United Kingdom), 10 new EU-10 Member States (Cyprus, Malta, Estonia, Lithuania, Latvia, Poland, Czech Republic, Slovakia, Slovenia, and Hungary), plus Romania, Bulgaria, Turkey, Iceland and Norway.
Information concerning data quality:
- Advantages and disadvantages (at data level): Data for maritime transport is insufficient.
- Relevance, accuracy, robustness, uncertainty: Data is quite reliable, except data for sea transport.
Reliability of the indicator (archive data): The data refers to a longer time period.
Uncertainty of the indicator (scenarios/projections): Projections have not been prepared.
- Overall assessment (1 = no major comments, 3 = data to be considered with reservation): 2
Relevance: 2 (Vehicle-kilometre would be a better unit of measurement, since it is more directly linked to the environmental impact of transport movements)
Accuracy: 2 (tkm figures are estimated rather than measured, but are rather consistent between sources, except for sea shipping)
Completeness over time: 2 (especially new Member States and candidate countries occasionally have breaks in time series)
Completeness over space: 2 (differences exist in methodology between individual countries regarding what data is included)

Other sources and literature:
- Slovenian Roads Agency, 2009: Performed kilometres in the period 1997–2007 on state roads in the Republic of Slovenia. Ljubljana, Slovenian Roads Agency (23 June 2009).
- EEA, 2006: TERM 2006 13b – Modal split in freight transport. Indicator Fact Sheet. European Environment Agency
- The Slovenian Police, 2009: The number of cargo vehicles on the border between the Republic of Slovenia and Republic of Hungary (from 2004 to 2007). Ljubljana, The Slovenian Police.
- Resolution on Transport Policy of the Republic of Slovenia. OG RS, no. 58/2006.
- SORS, 2004: Glossary for transport statistics (UNECE, ECMT, Eurostat). Ljubljana, Statistical Office of the Republic of Slovenia (23 June 2009).
- Šegan, V., 2005. Transport of goods on roads and railways in 2004. Ljubljana, Statistical Office of the Republic of Slovenia (23 June 2009).